Display apparatus having LED effectively prevented from being recognized as point source of light

Abstract

A display apparatus includes: a substrate; a light-emitting diode (“LED”) disposed above the substrate; a pixel-defining layer disposed above the substrate and including a concave portion which defines a space in which the LED is disposed; a light guider disposed in the space and between the LED and a first inner side surface of the concave portion; and a light blocker disposed above the pixel-defining layer to cover a top portion of the LED. The LED is disposed a second inner side surface of the concave portion, which is opposite to the first inner side surface, and spaced apart from a center of the concave portion, and the light guider guides light emitted from the LED to a region adjacent to the second inner side surface of the concave portion.

What is claimed is: 
     
       1. A display apparatus comprising:
 a substrate; 
 a light-emitting diode disposed above the substrate; 
 a pixel-defining layer disposed above the substrate and comprising a concave portion which defines a space in which the light-emitting diode is disposed; 
 a light guider disposed in the space and between the light-emitting diode and a first inner side surface of the concave portion; 
 a light blocker disposed above the pixel-defining layer to cover a top portion of the light-emitting diode, and 
 a light blocking layer disposed directly on at least a first side surface of the light-emitting diode, the light blocking layer comprising an insulating material; 
 wherein the light-emitting diode is disposed adjacent to a second inner side surface of the concave portion, which is opposite to the first inner side surface, and spaced apart from a center of the concave portion, 
 wherein the light blocker is overlapped with a part of a emission region defined by the pixel defining layer, the light blocker extends to three edges of the pixel defining layer in plain view, 
 the light guider guides light emitted from the light-emitting diode to a region adjacent to the first inner side surface of the concave portion, and 
 the first side surface is opposite to a second side surface of the light-emitting diode, the second side surface of the light-emitting diode facing the first inner side surface of the concave portion, the light blocking layer does not cover the second side surface. 
 
     
     
       2. The display apparatus of  claim 1 , wherein the light blocking layer extends to cover the top portion of the light-emitting diode. 
     
     
       3. The display apparatus of  claim 1 , wherein the light blocker extends along a first direction and is disposed above the second inner side surface of the concave portion. 
     
     
       4. The display apparatus of  claim 3 , further comprising:
 a first electrode disposed above the substrate, 
 wherein the light-emitting diode comprises:
 a p-n diode; 
 a first contact electrode electrically connected to the first electrode; and 
 a second contact electrode electrically connected to the light blocker. 
 
 
     
     
       5. The display apparatus of  claim 4 , wherein
 the light blocker extends along a second direction different from the first direction, and 
 a voltage for driving the light-emitting diode is applied to the light blocker. 
 
     
     
       6. The display apparatus of  claim 1 , wherein a plurality of scattered particles is distributed in the light guider. 
     
     
       7. The display apparatus of  claim 6 , wherein the scattered particles are more densely distributed in a direction away from the light-emitting diode. 
     
     
       8. The display apparatus of  claim 6 , wherein the scattered particles comprise a fluorescent substance. 
     
     
       9. The display apparatus of  claim 1 , wherein
 scattered patterns are defined on a surface of the light guider, 
 wherein the scattered patterns are defined more densely in a direction towards the light blocker. 
 
     
     
       10. The display apparatus of  claim 1 , wherein
 reflection patterns are disposed in a bottom portion of the concave portion, 
 wherein the reflection patterns are disposed more densely in a direction away from the light-emitting diode. 
 
     
     
       11. The display apparatus of  claim 10 , further comprising:
 a first electrode electrically connected to the light-emitting diode and disposed below the bottom portion of the concave portion, and 
 the reflection patterns are disposed above the first electrode. 
 
     
     
       12. The display apparatus of  claim 1 , further comprising:
 a molding portion disposed between the light-emitting diode and the light guider, 
 wherein the light-emitting diode comprises an n-type semiconductor layer, a p-type semiconductor layer, and an intermediate layer between the n-type semiconductor layer and the p-type semiconductor layer, and 
 the molding portion covers at least an exposed portion of the intermediate layer. 
 
     
     
       13. The display apparatus of  claim 12 , wherein a refractive index of the molding portion is different from a refractive index of the light guider. 
     
     
       14. The display apparatus of  claim 1 , wherein
 the light-emitting diode comprises a first contact electrode electrically connected to a first electrode of the display apparatus, and a second contact electrode electrically connected to a second electrode of the display apparatus, and 
 a plurality of carbon nano-tubes are distributed in the light guider, 
 wherein a density of the carbon nano-tubes in a region of the light guider between the first contact electrode and the first electrode or a region between the second contact electrode and the second electrode is higher than a density of the carbon-nano-tubes in remaining regions of the light guider. 
 
     
     
       15. The display apparatus of  claim 1 , wherein a reflection layer is disposed to cover an inner side surface of the concave portion. 
     
     
       16. The display apparatus of  claim 1 , wherein
 the concave portion comprises a first concave portion and a second concave portion, which are adjacent to each other, 
 the light-emitting diode comprises a first light-emitting diode and a second light-emitting diode, which are disposed in the first concave portion and the second concave portion, respectively, and 
 the light blocker extends to cover a top portion of the first light-emitting diode and a top portion of the second light-emitting diode. 
 
     
     
       17. The display apparatus of  claim 16 , wherein the first light-emitting diode and the second light-emitting diode are disposed adjacent to a portion of the pixel-defining layer between the first concave portion and the second concave portion. 
     
     
       18. The display apparatus of  claim 17 , wherein the light blocker is disposed to cover the top portion of the first light-emitting diode, the top portion of the second light-emitting diode, and the portion of the pixel-defining layer between the first concave portion and the second concave portion. 
     
     
       19. A display apparatus comprising:
 a substrate; 
 a light-emitting diode disposed above the substrate; 
 a pixel-defining layer disposed above the substrate and comprising a concave portion which defines a space for accommodating the light-emitting diode; and 
 a light blocker disposed to cover a top surface of the light-emitting diode, 
 wherein the light-emitting diode is spaced apart from a center of the concave portion and disposed adjacent to an inner surface of the pixel-defining layer which defines the concave portion, and 
 the light-emitting diode comprises: a first side surface, which faces the inner surface of the pixel-defining layer which defines the concave portion; and a second side surface, which is opposite to the first side surface, 
 wherein a light blocking layer comprising an insulating material is disposed directly on at least the first side surface of the light-emitting diode, and the light blocking layer does not cover the second side surface, and 
 wherein the light blocker is overlapped with a part of a emission region defined by the pixel defining layer, the light blocker extends to three edges of the pixel defining layer in plain view.